nuget: bump DynamicData from 7.13.5 to 7.13.8 (#5001)

Bumps [DynamicData](https://github.com/reactiveui/DynamicData) from 7.13.5 to 7.13.8.
- [Release notes](https://github.com/reactiveui/DynamicData/releases)
- [Changelog](https://github.com/reactivemarbles/DynamicData/blob/main/ReleaseNotes.md)
- [Commits](https://github.com/reactiveui/DynamicData/compare/7.13.5...7.13.8)

---
updated-dependencies:
- dependency-name: DynamicData
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Directory.Packages.props

@@ -13,7 +13,7 @@
     <PackageVersion Include="CommandLineParser" Version="2.9.1" />
     <PackageVersion Include="Concentus" Version="1.1.7" />
     <PackageVersion Include="DiscordRichPresence" Version="1.1.3.18" />
-    <PackageVersion Include="DynamicData" Version="7.13.5" />
+    <PackageVersion Include="DynamicData" Version="7.13.8" />
     <PackageVersion Include="FluentAvaloniaUI" Version="1.4.5" />
     <PackageVersion Include="GtkSharp.Dependencies" Version="1.1.1" />
     <PackageVersion Include="GtkSharp.Dependencies.osx" Version="0.0.5" />